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        data-chapter-title="第三节：函数"
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                        Introduction
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                            <b>1.</b>
                        
                        第一章：小程序前奏
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                            <b>1.1.</b>
                        
                        第一节：认识小程序
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                            <b>1.2.</b>
                        
                        第二节：准备工作
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                            <b>1.3.</b>
                        
                        第三节：开发工具介绍
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                            <b>1.4.</b>
                        
                        第六节：WXSS语法
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                            <b>2.</b>
                        
                        第二章：小程序基础
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                            <b>2.1.</b>
                        
                        第一节：项目结构
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                            <b>2.2.</b>
                        
                        第二节：配置
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                            <b>2.3.</b>
                        
                        第三节：WXML语法
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                            <b>2.4.</b>
                        
                        第五节：事件
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                            <b>2.5.</b>
                        
                        第六节：WXSS语法
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                            <b>2.6.</b>
                        
                        第七节：flex布局
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                            <b>2.7.</b>
                        
                        第八节：APP对象
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                            <b>2.8.</b>
                        
                        第九节：Page对象
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                            <b>2.9.</b>
                        
                        第十节：WXS语法
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                            <b>3.</b>
                        
                        第三章：常用组件
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                            <b>3.1.</b>
                        
                        第一节：scroll-view组件
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                            <b>3.2.</b>
                        
                        第二节：swiper组件
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                            <b>3.3.</b>
                        
                        第三节：movable-view组件
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                            <b>3.4.</b>
                        
                        第四节：icon组件
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                            <b>3.5.</b>
                        
                        第五节：text组件
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                            <b>3.6.</b>
                        
                        第六节：input组件
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                            <b>3.7.</b>
                        
                        自定义组件
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            <span><b>4.</b> 第四章：小程序API</span>
            
            
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                            <b>4.1.</b>
                        
                        第一节：网络请求API
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                            <b>5.</b>
                        
                        第五章：ES6语法
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                            <b>5.1.</b>
                        
                        第一节：什么是ES6语法
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                            <b>5.2.</b>
                        
                        第二节：定义变量
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                            <b>5.3.</b>
                        
                        第三节：函数
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                            <b>5.4.</b>
                        
                        第四节：类
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                            <b>5.5.</b>
                        
                        第五节：模块
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                            <b>6.</b>
                        
                        第六章：云开发
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                            <b>6.1.</b>
                        
                        第一节：什么是云开发
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                            <b>6.2.</b>
                        
                        第二节：注册微信小程序
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                            <b>6.3.</b>
                        
                        第三节：开通云开发
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                            <b>6.4.</b>
                        
                        第四节：数据库准备
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                            <b>6.5.</b>
                        
                        第五节：数据库操作
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                            <b>6.6.</b>
                        
                        第六节：command指令
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                            <b>6.7.</b>
                        
                        第七节：高级查询
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        <li class="chapter " data-level="6.8" data-path="di-ba-jie-ff1a-wen-jian-shang-chuan.html">
            
                
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                            <b>6.8.</b>
                        
                        第八节：文件操作
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        <li class="chapter " data-level="6.9" data-path="di-jiu-jie-ff1a-node-huan-jing-da-jian.html">
            
                
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                            <b>6.9.</b>
                        
                        第九节：node环境搭建
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        <li class="chapter " data-level="6.10" data-path="di-shi-jie-ff1a-yun-han-shu.html">
            
                
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                            <b>6.10.</b>
                        
                        第十节：云函数
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        <li class="chapter " data-level="6.11" data-path="di-shi-yi-jie-ff1a-yun-han-shu-jian-ce-nei-rong-an-quan.html">
            
                
                    <a href="../di-shi-yi-jie-ff1a-yun-han-shu-jian-ce-nei-rong-an-quan.html">
                
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                            <b>6.11.</b>
                        
                        第十一节：检测内容安全
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        <li class="chapter " data-level="6.12" data-path="di-shi-er-jie-ff1a-yun-han-shu-tu-pian-jian-huang.html">
            
                
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                            <b>6.12.</b>
                        
                        第十二节：图片鉴黄
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                            <b>6.13.</b>
                        
                        第十三节：用户授权
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                            <b>6.14.</b>
                        
                        第十四节：其他授权方式
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                        <h1 id="&#x51FD;&#x6570;&#xFF1A;">&#x51FD;&#x6570;&#xFF1A;</h1>
<h2 id="&#x9ED8;&#x8BA4;&#x53C2;&#x6570;&#xFF1A;">&#x9ED8;&#x8BA4;&#x53C2;&#x6570;&#xFF1A;</h2>
<p>&#x5728;<code>ES 2015</code>&#x4E4B;&#x524D;&#xFF0C;&#x51FD;&#x6570;&#x662F;&#x4E0D;&#x80FD;&#x6307;&#x5B9A;&#x9ED8;&#x8BA4;&#x53C2;&#x6570;&#x7684;&#xFF0C;&#x5728;<code>ES 2015</code>&#x540E;&#xFF0C;&#x5C31;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x9ED8;&#x8BA4;&#x53C2;&#x6570;&#x4E86;&#x3002;&#x6BD4;&#x5982;&#x4EE5;&#x4E0B;&#x4EE3;&#x7801;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">fetch</span>(<span class="hljs-params">url,method=&quot;get&quot;</span>)</span>{
    <span class="hljs-comment">// &#x53D1;&#x9001;&#x7F51;&#x7EDC;&#x8BF7;&#x6C42;&#x6848;&#x4F8B;</span>
    <span class="hljs-built_in">console</span>.log(url);
    <span class="hljs-built_in">console</span>.log(method);
}
</code></pre>
<p>&#x90A3;&#x4E48;&#x4EE5;&#x540E;&#x6211;&#x4EEC;&#x5728;&#x4F7F;&#x7528;<code>fetch</code>&#x51FD;&#x6570;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x53EF;&#x4EE5;&#x4E0D;&#x4F20;<code>method</code>&#x53C2;&#x6570;&#xFF0C;&#x4ED6;&#x4F1A;&#x9ED8;&#x8BA4;&#x4F7F;&#x7528;<code>get</code>&#xFF1A;</p>
<pre><code class="lang-js">fetch(<span class="hljs-string">&quot;http://www.baidu.com/&quot;</span>); <span class="hljs-comment">//method == get</span>
fetch(<span class="hljs-string">&quot;http://www.baidu.com/&quot;</span>,<span class="hljs-string">&quot;post&quot;</span>) <span class="hljs-comment">// method == post</span>
</code></pre>
<p><strong>&#x5B9A;&#x4E49;&#x9ED8;&#x8BA4;&#x53C2;&#x6570;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x9ED8;&#x8BA4;&#x53C2;&#x6570;&#x5FC5;&#x987B;&#x8981;&#x5728;&#x975E;&#x9ED8;&#x8BA4;&#x53C2;&#x6570;&#x7684;&#x540E;&#x9762;&#x3002;</strong></p>
<p>&#x5982;&#x679C;&#x6709;&#x591A;&#x4E2A;&#x9ED8;&#x8BA4;&#x503C;&#xFF0C;&#x6211;&#x4EEC;&#x53EA;&#x60F3;&#x63D0;&#x4F9B;&#x5176;&#x4E2D;&#x7684;&#x4E00;&#x4E2A;&#x9ED8;&#x8BA4;&#x503C;&#xFF0C;&#x90A3;&#x4E48;&#x8FD9;&#x65F6;&#x5019;&#x9700;&#x8981;&#x4E0E;&#x89E3;&#x6784;&#x8D4B;&#x503C;&#x9ED8;&#x8BA4;&#x503C;&#x7ED3;&#x5408;&#x4F7F;&#x7528;&#xFF0C;&#x793A;&#x4F8B;&#x4EE3;&#x7801;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">person</span>(<span class="hljs-params">name,age=18,gender=&apos;&#x7537;&apos;</span>)</span>{
    <span class="hljs-built_in">console</span>.log(name,age,gender);
}
</code></pre>
<p>&#x6BD4;&#x5982;&#x6211;&#x53EA;&#x60F3;&#x63D0;&#x4F9B;<code>gender</code>&#x8FD9;&#x4E2A;&#x9ED8;&#x8BA4;&#x53C2;&#x6570;&#xFF0C;<code>age</code>&#x8FD9;&#x4E2A;&#x53C2;&#x6570;&#x4E0D;&#x63D0;&#x4F9B;&#xFF0C;&#x90A3;&#x4E48;&#x5FC5;&#x987B;&#x4E0E;&#x89E3;&#x6784;&#x8D4B;&#x503C;&#x9ED8;&#x8BA4;&#x503C;&#x7ED3;&#x5408;&#x4F7F;&#x7528;&#x5B9E;&#x73B0;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">person</span>(<span class="hljs-params">name,{age=18,gender=&apos;&#x5973;&apos;}={}</span>)</span>{
    <span class="hljs-built_in">console</span>.log(name,age,gender);
}
person(<span class="hljs-string">&quot;&#x77E5;&#x4E86;&quot;</span>,{gender:<span class="hljs-string">&quot;&#x7537;&quot;</span>});
</code></pre>
<h2 id="&#x7BAD;&#x5934;&#x51FD;&#x6570;&#xFF1A;">&#x7BAD;&#x5934;&#x51FD;&#x6570;&#xFF1A;</h2>
<p>&#x6709;&#x65F6;&#x5019;&#xFF0C;&#x51FD;&#x6570;&#x4F5C;&#x4E3A;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x53D8;&#x91CF;&#x4F20;&#x8FDB;&#x53BB;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x4E3A;&#x4E86;&#x7B80;&#x5316;&#x4ED6;&#x7684;&#x5199;&#x6CD5;&#xFF0C;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x7BAD;&#x5934;&#x51FD;&#x6570;&#x6765;&#x5B9E;&#x73B0;&#x3002;&#x6BD4;&#x5982;&#x4EE5;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js">wx.request({
    url: <span class="hljs-string">&quot;http://www.baidu.com/&quot;</span>,
    success: <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">res</span>)</span>{
        <span class="hljs-comment">// &#x505A;&#x4E00;&#x4E9B;&#x4E8B;&#x60C5;</span>
    }
});
</code></pre>
<p>&#x4EE5;&#x4E0A;&#x4EE3;&#x7801;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x7BAD;&#x5934;&#x51FD;&#x6570;&#x8FDB;&#x884C;&#x7B80;&#x5316;&#xFF1A;</p>
<pre><code class="lang-js">wx.request({
    url: <span class="hljs-string">&apos;http://www.baidu.com/&apos;</span>,
    success: res =&gt; {
        <span class="hljs-comment">//&#x505A;&#x4E00;&#x4E9B;&#x4E8B;&#x60C5;</span>
    }
});
</code></pre>
<p>&#x53EF;&#x4EE5;&#x770B;&#x5230;&#x4F7F;&#x7528;&#x7BAD;&#x5934;&#x51FD;&#x6570;&#x66F4;&#x52A0;&#x7684;&#x7B80;&#x6D01;&#x3002;<br>&#x7BAD;&#x5934;&#x51FD;&#x6570;&#x7684;&#x8BED;&#x6CD5;&#x662F;&#xFF1A;</p>
<pre><code class="lang-js">(&#x53C2;&#x6570;<span class="hljs-number">1</span>,&#x53C2;&#x6570;<span class="hljs-number">2</span>) =&gt; {&#x4EE3;&#x7801;&#x5757;}

&#x5982;&#x679C;&#x53EA;&#x6709;&#x4E00;&#x884C;&#x4EE3;&#x7801;&#xFF0C;&#x90A3;&#x4E48;&#x53EF;&#x4EE5;&#x4E0D;&#x7528;&#x82B1;&#x62EC;&#x53F7;&#xFF1A;
(a,b) =&gt; a+b <span class="hljs-comment">// &#x8FD4;&#x56DE;a+b&#x7684;&#x7ED3;&#x679C; </span>

<span class="hljs-comment">// &#x5982;&#x679C;&#x53EA;&#x6709;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#xFF0C;&#x53EF;&#x4EE5;&#x4E0D;&#x4F7F;&#x7528;&#x5706;&#x62EC;&#x53F7;</span>
a =&gt; a+<span class="hljs-number">1</span>
</code></pre>
<h2 id="promise&#x98CE;&#x683C;&#x7684;&#x8C03;&#x7528;&#xFF1A;">Promise&#x98CE;&#x683C;&#x7684;&#x8C03;&#x7528;&#xFF1A;</h2>
<p>&#x5728;&#x4E91;&#x5F00;&#x53D1;&#x4E2D;&#xFF0C;&#x63D0;&#x4F9B;&#x7684;<code>API</code>&#x6709;&#x5927;&#x91CF;&#x7684;<code>Promise</code>&#x65B9;&#x5F0F;&#x8C03;&#x7528;&#x3002;&#x5728;&#x8FD9;&#x91CC;&#x5C31;&#x7B80;&#x5355;&#x7684;&#x8BB2;&#x89E3;&#x4E00;&#x4E0B;<code>Promise</code>&#x7684;&#x5B9E;&#x73B0;&#x539F;&#x7406;&#x3002;&#x770B;&#x4EE5;&#x4E0B;&#x4EE3;&#x7801;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-keyword">const</span> p = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">resolve,reject</span>)</span>{
    <span class="hljs-comment">// &#x5982;&#x679C;&#x6267;&#x884C;&#x4EE5;&#x4E0B;&#x4EE3;&#x7801;&#xFF0C;&#x90A3;&#x4E48;&#x4F1A;&#x6267;&#x884C;&#x4E0B;&#x9762;&#x7684;then&#x51FD;&#x6570;</span>
    setTimeout(() =&gt; {
        resolve(<span class="hljs-string">&quot;success&quot;</span>);
    },<span class="hljs-number">1000</span>);
    <span class="hljs-comment">// &#x5982;&#x679C;&#x6267;&#x884C;&#x4EE5;&#x4E0B;&#x4EE3;&#x7801;&#xFF0C;&#x90A3;&#x4E48;&#x4F1A;&#x6267;&#x884C;&#x4E0B;&#x9762;&#x7684;catch&#x51FD;&#x6570;</span>
    setTimeout(() =&gt; {
        reject(<span class="hljs-string">&quot;fail&quot;</span>)
    },<span class="hljs-number">1000</span>);
    <span class="hljs-comment">// &#x5982;&#x679C;&#x4EE5;&#x4E0A;&#x4E24;&#x4E2A;&#x4EE3;&#x7801;&#x90FD;&#x6267;&#x884C;&#xFF0C;&#x90A3;&#x4E48;&#x53EA;&#x4F1A;&#x8C03;&#x7528;&#x4E0B;&#x9762;&#x7684;then&#x65B9;&#x6CD5;&#xFF0C;&#x56E0;&#x4E3A;resolve&#x7684;&#x8C03;&#x7528;&#x5728;&#x524D;&#x9762;&#x3002;</span>
});

p.then((res) =&gt; {
  <span class="hljs-built_in">console</span>.log(res);
}).catch((error) =&gt; {
  <span class="hljs-built_in">console</span>.log(error);
});
</code></pre>
<p>&#x4EE5;&#x540E;&#x5728;&#x4E91;&#x5F00;&#x53D1;&#x4E2D;&#xFF0C;&#x5982;&#x679C;&#x51FA;&#x73B0;<code>then</code>&#x548C;<code>catch</code>&#xFF0C;&#x5C31;&#x77E5;&#x9053;&#x5206;&#x522B;&#x5BF9;&#x5E94;&#x7684;&#x662F;&#x6210;&#x529F;&#x7684;&#x56DE;&#x8C03;&#x4EE5;&#x53CA;&#x5931;&#x8D25;&#x7684;&#x56DE;&#x8C03;&#x3002;</p>

                    
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